AnswersVA-Ecology -CRPR 26-27 MC S1Freshwater and Marine Biomes

Human Events and the Environment Answers

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1
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How can the practice of tillage be harmful to the overall environment?

A
It can impact waterways through sedimentation and pollution.
B
It is harmful to the soil that is tilled.
C
Tillage decreases overall crop productivity.
D
All of the above
2
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Which of the following was an environmental consequence of the nuclear meltdown at Chernobyl?

A
evacuation of Pripyat
B
high levels of radiation
C
increased CO2 levels
D
none of the above
3

Large-scale fires can lead to a decrease in atmospheric carbon dioxide.

A
T
B
F
4

How is the environment affected by a large-scale oil spill?

A
Large-scale oil spills are the largest contributor to air pollution.
B
Large-scale oil spills lead directly to wetlands becoming deserts.
C
Large-scale oil spills are damaging to water quality, aquatic life, and bird populations.
D
Large-scale oil spills can lead to an increase in sea levels through glacial melting.
5

Degradates, unlike their parent compounds, are always completely harmless.

A
T
B
F
6

What sometimes occurs when reclaimed water is used in agriculture?

A
crop death
B
overtillage
C
pharmaceutical accumulation
D
increased land use
7

Which of the following is a consequence of sedimentation to wetlands?

A
increased biodiversity
B
water quality improvement
C
habitat loss
D
decreased turbidity
8

Which of the following factors can lead to desertification in the presence of natural drought?

A
deforestation
B
sustainable grazing
C
underground mining
D
all of the above
9

Sedimentation increases with an increase in land used for agriculture.

A
T
B
F
10

Dead zones in waterways can occur as the result of fertilizer runoff.

A
T
B
F

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